i think a closed airbox with knn element would be better.... since urs an auto....
why?
not sure but i think it got sumtin to do with the target powerband that differs from open pod to close pod / box type....
open pods normally serve its purpose well from mid to higher revs..... so a manual ride with freedom to control gear shifts have advantage.....
close pods will give better grunt at lower end and this will benefit auto trans car....
i also think other factors that improve the breathing to a car (air filter related) would also include:
- the length, and size/diameter of the air ram
- the air pressure and speed inside the air ram
- the position of the filter (near heat source or not? near a dead-air position or not?)
- the temperature of the air (rule of thumb: the colder the better, hence CAI type or just CAI flexible pipe used will give significant feel when u floor the throttle)
- the material and filtration level of the filter (mesh wire, sponge type, cotton type, etc allow for different filtration level....some are more resistant while some are lesser)
- how dirty is the filter? even the best aftermarket filters will perform worst than factory paper type if its not clean! also another rule of thumb.....keep ou filters clean.... haha
just my 2 cents from my 2 cents experience....